MySQL

Hey, recently a little idle, re-installed MySQL to learn.-----Blog Park-Bang Bang sauce goodSystem environment:1. The host is a Windows system with SQLyog installed.2. The host also installed a virtual machine, the system is centos6.4, the inside

The principles of data segmentation can be found in blogs:http://blog.csdn.net/jhq0113/article/details/44226789For an introduction to Atlas, see the blog:http://blog.csdn.net/jhq0113/article/details/44239823 the Atlas source code is written in C,

From:http://jingyan.baidu.com/article/e52e3615a1128c40c70c5174.htmlInstall (unzip)The ZIP version archive is free to install. Just unzip the line. It's no different from the installation version, but it doesn't need to be installed. Find the

Makefile. Suffixes:. C. occ=gccsrcs=mysql1.cmydb.cobjs=$ (SRCS:.C=.O) Exec=mysql1all: $ (OBJS) $ (CC)-O $ (EXEC) $ (OBJS)- Lmysqlclient@echo '-------------OK--------------'. c.o:$ (CC)-wall-g-o [email protected]-C $Mydb.h#ifndef mydb_h_#define

Use explain to view, as follows1, first create the table test, the statement is as follows[SQL]View Plaincopy Create table Test (a int,b varchar (), c varchar (10)); 2, A and B in the table to create the index, the order is a, a,

Symptom: Linux Installation discuz error hint: mysql_connect () does not support check that the MySQL module is loading correctly.Workaround: View/usr/lib/php/modules/(64-bit look at/usr/lib64/php/modules/) there is no mysql.so.Locate the centos5.4

Open the My.ini file, under the location installation directory, add an open log configuration, restart MySQL # SERVER section#----------------------------------------------------------------------# # The following options would Be read by the MySQL

[[email protected] myfile]# cat mysqlback_zabbix.sh #!/bin/bashuser=rootdb=zabbix# password=123456server=172.16.9.129dir_home=/vol/myfile/mysql_$serverlog_file= $DIR _home/logs/mysqlback.logif  [ ! -d  $DIR _home ];then mkdir  $DIR

From:http://blog.chinaunix.net/uid-26729093-id-4294287.htmlPlease refer to: http://bbs.csdn.net/topics/330021260CREATE TABLE T2 (ID int PRIMARY KEY,GID Char,col1 int,col2 int) Engine=myisam;INSERT INTO T2 values(1, ' A ', 31,6),(2, ' B ', 25,83),(3,

I. Attribute analysis1.tablepre: Table name prefix2.version: Database version3.drivertype: Drive Type4.querynum: Number of Queries5.curlink: Current Connection6.link: Storage Connection Resources7.config: Configuration Items8.sqldebug:sql

1.linux commands to start MySQL:Mysqladmin start/ect/init.d/mysql start (front of MySQL installation path)2.linux Restart MySQL command:Mysqladmin restart/ect/init.d/mysql Restart (front of MySQL installation path)3.linux the command to turn off

Show tables or show tables from database_name; Displays the names of all tables in the current databaseshow databases; Displays the names of all databases in MySQLShow columns from table_name to database_name; or show columns from

MySQL multi-line Merge one column uses the function as:GROUP_CONCAT (exp)The parameters of exp are similar to the following:(Field order BY field desc separator '; ') ）;The specific examples are as follows:To create a table:CREATE TABLE' login ' ('

After configuring the LNMP environment, the default site directory and database storage directory are in the system disk, so we need to transfer them to the data disk.Change the Web site file directoryIf you're using the LNMP one-click installation

Background:MariaDB has supported the function of concurrent replication in 10.0.0.5, that is, multi-threaded copying from libraries. MySQL was first supported in 5.6.3. Currently there is no use of MySQL5.6 version, so temporarily only to mariadb

Set allow remote connection to MySQL (Ubuntu for example)MySQL default configuration is not allowed for remote connection, for security!But I need to do this;start to change configuration;#1 Set User RightsType ' help ', ' or ' \h ' for help. Type '

The Win7 is the 64-bit flagship version.Installation package:Php-5.6.3-win32-vc11-x64.zipHttpd-2.4.10-win64-vc11.zipMysql-5.6.22-winx64.zipUnzip to the appropriate path.1.phpCopy the php.ini-production and change the name to PHP.ini as follows:;Hide

The MySQL proxy is between the client application and the MySQL server, and realizes its function by truncating, altering and forwarding communication between the client and the back-end database, which is the same as the basic idea of a network

Ifnull (EXPR1,EXPR2)If EXPR1 is not Null,ifnull () returns EXPR1, it returns EXPR2. Ifnull () returns a numeric or string value, depending on the context in which it is used.Mysql> Select Ifnull (1,0);1Mysql> Select Ifnull (0,10);0Mysql> Select

Mysql cannot start ERROR! MySQL is running but PID file cocould not be found, mysqlrunning After the Spring Festival, the server has been running. Today, we found that the static website pages published on Tomcat can be accessed, but the pages